Then on 17 July 1453 he and John Talbot, 1st Earl of Shrewsbury, fought the French forces at the Battle of Castillon.
John negotiated his ransom directly with Olivier de Coëtivy and was released, after seven years on 18 January 1460, after promising to pay 23,850 écus.
On his release he left France for England where he was captured in the Tower of London following the Battle of Northampton on 10 July 1460.
Jean de Foix now entered in the service of King Louis XI.
(Elizabeth was sister to William de la Pole, 1st Duke of Suffolk.